AXIOMTEK sbc84500, User Manual

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SBC84500 User’s Manual
3.12.1 Digital I/O Software Programming
The Digital I/O on the the board is not an isolated type.
Output Address Bit Output Address Bit
Out-0 123h 0 In-0 123h 0
Out-1 123h 1 In-1 123h 1
Out-2 123h 2 In-2 123h 2
Out-3 123h 3 In-3 123h 3
Out-4 123h 4 In-4 123h 4
Out-5 123h 5 In-5 123h 5
Out-6 123h 6 In-6 123h 6
Out-7 123h 7 In-7 123h 7
Example program;
Out 123h, 03h Out-0, Out-1 Turn On
Out-2, Out-3 Turn Off
Out 123h, 0Ah Out-0, Out-2 Turn Off
Out-1, Out-3 Turn On
Example program;
If INPUT 123 is
(1011), then INPUT-2 is “0”
If INPUT 123 is (1100), then INPUT-0 & 1 are “0”
** The INPUT signal has to be TTL signal
Hardware Description
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